<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>通配符选择器</title>

  <style>
    /* 通配符 -去除标签的默认样式  */
    * {
      margin: 0;
      padding: 0;
      text-decoration: none;
      list-style-type: none;
    }

    /* 组合选择器-以','隔开标签设置共同样式 */
    .div,
    .a,
    .ul1 {
      font-size: 25px;
    }
  </style>
</head>

<body>
  <div class="div1">我是一个div</div>
  <a href="https://www.baidu.com" class="a">百度一下</a>
  <ul class="ul1">
    <li>苹果</li>
    <li>苹果</li>
    <li>苹果</li>
  </ul>

</body>

</html>